Finding the Fourth Proportional to 8,271.72, 11,415.33 and 5,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.72 : 11,415.33 = 5,086.80 : x
2. Step 2: Convert to fraction form
   8,271.72/11,415.33 = 5,086.80/x
3. Step 3: Cross multiply
   8,271.72x = 11,415.33 × 5,086.80
4. Step 4: Simplify right side
   8,271.72x = 58,067,500.64
5. Step 5: Solve for x
   x = 58,067,500.64/8,271.72
6. Step 6: Final answer
   x = 7,020.00